diff --git a/pom.xml b/pom.xml
index a5a0b691..afd2672f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -11,7 +11,7 @@
 		<dependency>
 			<groupId>com.google.oauth-client</groupId>
 			<artifactId>google-oauth-client</artifactId>
-			<version>1.20.0</version>
+			<version>1.23.0</version>
 		</dependency>
 		<dependency>
 			<groupId>com.googlecode.json-simple</groupId>
@@ -78,13 +78,13 @@
 		<github.global.server>github</github.global.server>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-        <java.version>1.7</java.version>
+        <java.version>1.8</java.version>
     </properties>
 	<build>
 		<finalName>Xero-Java-SDK</finalName>
 		<plugins>
 			<plugin>
-				<artifactId>maven-deploy-plugin</artifactId>
+				<artifactId>maven3-deploy-plugin</artifactId>
 				<version>2.8.1</version>
 				<configuration>
 					<altDeploymentRepository>internal.repo::default::file://${project.build.directory}/mvn-repo</altDeploymentRepository>
diff --git a/src/main/java/com/xero/api/OAuthRequestResource.java b/src/main/java/com/xero/api/OAuthRequestResource.java
index b32eb935..82328354 100644
--- a/src/main/java/com/xero/api/OAuthRequestResource.java
+++ b/src/main/java/com/xero/api/OAuthRequestResource.java
@@ -284,6 +284,10 @@ public final Map<String, String> execute() throws IOException,XeroApiException
 					content = "<Response><Status>DELETED</Status></Response>";
 		        }
 		        if (code != 200 && code != 204) {
+		            Header rateHeader = response.getFirstHeader("x-rate-limit-problem");
+		            if (rateHeader != null) {
+		                content += "&rate=" + rateHeader.getValue().toLowerCase();
+                    }
 					XeroApiException e = new XeroApiException(code,content);
 		        		throw e;
 		        }
diff --git a/src/main/java/com/xero/api/XeroClient.java b/src/main/java/com/xero/api/XeroClient.java
index 4f6c9aba..46756e08 100644
--- a/src/main/java/com/xero/api/XeroClient.java
+++ b/src/main/java/com/xero/api/XeroClient.java
@@ -1694,11 +1694,13 @@ public List<TrackingCategory> getTrackingCategories() throws IOException {
         }
     }
 
-    public List<TrackingCategory> getTrackingCategories(Date modifiedAfter, String where, String order)
+    public List<TrackingCategory> getTrackingCategories(Date modifiedAfter, String where, String order,
+                                                        Boolean includeArchived)
         throws IOException {
         Map<String, String> params = new HashMap<>();
         addToMapIfNotNull(params, "Where", where);
         addToMapIfNotNull(params, "order", order);
+        addToMapIfNotNull(params, "includeArchived", includeArchived);
 
         Response responseObj = get("TrackingCategories", modifiedAfter, params);
         if (responseObj.getTrackingCategories() == null) {
diff --git a/src/main/java/com/xero/api/jaxb/XeroJAXBMarshaller.java b/src/main/java/com/xero/api/jaxb/XeroJAXBMarshaller.java
index 7c35f399..da1b1ea0 100644
--- a/src/main/java/com/xero/api/jaxb/XeroJAXBMarshaller.java
+++ b/src/main/java/com/xero/api/jaxb/XeroJAXBMarshaller.java
@@ -20,9 +20,6 @@
  * cannot create the marshaller or unmarshaller
  */
 public class XeroJAXBMarshaller {
-
-    private final Marshaller marshaller;
-    private final Unmarshaller unmarshaller;
     static final JAXBContext context = initContext();
 
     private static JAXBContext initContext() {
@@ -34,20 +31,13 @@ private static JAXBContext initContext() {
     }
 
     public XeroJAXBMarshaller() {
-        try { 
-            //context = JAXBContext.newInstance("com.xero.model");
-            marshaller = context.createMarshaller();
-            unmarshaller = context.createUnmarshaller();
-        } catch (Exception e) {
-            throw new XeroClientException(e.getMessage(), e);
-        }
     }
 
     
     public String marshall(JAXBElement<?> object) {
         try {
             StringWriter writer = new StringWriter();
-            marshaller.marshal(object, writer);
+            context.createMarshaller().marshal(object, writer);
             return writer.toString();
         } catch (JAXBException e) {
             throw new IllegalStateException("Error marshalling request object " + object.getClass(), e);
@@ -57,7 +47,7 @@ public String marshall(JAXBElement<?> object) {
     public <T> T unmarshall(String responseBody, Class<T> clazz) throws UnsupportedEncodingException {
         try {
             Source source = new StreamSource(new StringReader(responseBody));
-            return unmarshaller.unmarshal(source, clazz).getValue();
+            return context.createUnmarshaller().unmarshal(source, clazz).getValue();
         } catch (JAXBException e) {
             throw new IllegalStateException("Error unmarshalling response: " + responseBody, e);
         }
diff --git a/src/main/java/com/xero/example/RequestResourceServlet.java b/src/main/java/com/xero/example/RequestResourceServlet.java
index 8db96ad0..8a6a434c 100755
--- a/src/main/java/com/xero/example/RequestResourceServlet.java
+++ b/src/main/java/com/xero/example/RequestResourceServlet.java
@@ -982,7 +982,7 @@ protected void doPost(HttpServletRequest request, HttpServletResponse response)
 				String deleteTrackingCategoryOption = client.deleteTrackingCategoryOption(newTrackingCategory.get(0).getTrackingCategoryID(),newTrackingCategoryOption.get(0).getTrackingOptionID());
 				messages.add("Delete TrackingCategory Option -  : " + deleteTrackingCategoryOption);
 				
-				List<TrackingCategory> TrackingCategoryWhere = client.getTrackingCategories(null,"Status==\"ACTIVE\"",null);
+				List<TrackingCategory> TrackingCategoryWhere = client.getTrackingCategories(null,"Status==\"ACTIVE\"",null, false);
 				messages.add("Get a TrackingCategory with WHERE clause - Name : " + TrackingCategoryWhere.get(0).getName());
 				
 				List<TrackingCategory> TrackingCategoryList = client.getTrackingCategories();